android 权限动态申请

名字其实有点让人感觉高大上"权限动态申请",其实也没有什么,

以前做Android程序的时候,比如需要打开摄像头

那么需要在

然后就可以了,

但是Android6.0之后呢,有些权限必须手动让用户同意才可以,哪些权限需要用户手动同意,哪些不需要这里大家自行百度

现在说一下

直接上程序吧

public void checkPermission(){int targetSdkVersion = 0;String[] PermissionString={Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.CAMERA};try {final PackageInfo info = this.getPackageManager().getPackageInfo(this.getPackageName(), 0);targetSdkVersion = info.applicationInfo.targetSdkVersion;//获取应用的Target版本} catch (PackageManager.NameNotFoundException e) {e.printStackTrace();
//            Log.e("err", "检查权限_err0");
        }if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//Build.VERSION.SDK_INT是获取当前手机版本 Build.VERSION_CODES.M为6.0系统//如果系统>=6.0if (targetSdkVersion >= Build.VERSION_CODES.M) {//第 1 步: 检查是否有相应的权限boolean isAllGranted = checkPermissionAllGranted(PermissionString);if (isAllGranted) {//Log.e("err","所有权限已经授权！");return;}// 一次请求多个权限, 如果其他有权限是已经授予的将会自动忽略掉ActivityCompat.requestPermissions(this,PermissionString, 1);}}}/*** 检查是否拥有指定的所有权限*/private boolean checkPermissionAllGranted(String[] permissions) {for (String permission : permissions) {if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {// 只要有一个权限没有被授予, 则直接返回 false//Log.e("err","权限"+permission+"没有授权");return false;}}return true;}//申请权限结果返回处理
    @Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);if (requestCode == 1) {boolean isAllGranted = true;// 判断是否所有的权限都已经授予了for (int grant : grantResults) {if (grant != PackageManager.PERMISSION_GRANTED) {isAllGranted = false;break;}}if (isAllGranted) {// 所有的权限都授予了Log.e("err","权限都授权了");} else {// 弹出对话框告诉用户需要权限的原因, 并引导用户去应用权限管理中手动打开权限按钮//容易判断错//MyDialog("提示", "某些权限未开启,请手动开启", 1) ;
            }}}

程序启动的时候检查权限

现在说一下流程

说一下,如果调用这个

就会执行

    private void MyDialog(final String str1, final String str2, final int index) {android.support.v7.app.AlertDialog.Builder AlertDialogBuilder = new android.support.v7.app.AlertDialog.Builder(MainActivity.this, R.style.MyDialog);View mView = LayoutInflater.from(MainActivity.this).inflate(R.layout.dialog_config_button2, null);final TextView mTextView1 = mView.findViewById(R.id.tvdogcon1);final TextView mTextView2 = mView.findViewById(R.id.tvdogcon2);final Button mButton1 = mView.findViewById(R.id.btdogcon1);final Button mButton2 = mView.findViewById(R.id.btdogcon2);mButton2.setText("前去设置");mButton2.setTextColor(Color.BLUE);mButton1.setText("取消");mButton1.setTextColor(Color.BLACK);mTextView1.setText(str1);mTextView2.setText(str2);AlertDialogBuilder.setView(mView);//对话框加载视图
final android.support.v7.app.AlertDialog alertdialogbuilder = AlertDialogBuilder.create();alertdialogbuilder.setCanceledOnTouchOutside(false);//点击外围不消失
alertdialogbuilder.show();mButton1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {alertdialogbuilder.dismiss();}});mButton2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {alertdialogbuilder.dismiss();Intent intent = new Intent();intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");intent.setData(Uri.fromParts("package", getPackageName(), null));startActivity(intent);}});}